Microanalyses

The microanalyses were run by the Schwarzkopf Microanalytical Laboratory, Woodside, NY. The l%Rh/Al203 catalyst was obtained from Johnson Matthey. 

Nature of the Active Species. It was considered that microanalyses of the starting anchored catalyst and that recovered from a hydrogenation would provide the... 

Applications Some typical applications of TXRF are quantitative microanalyses of samples in the 10-100 xg range, forensic applications, microinclusions, environmental samples like rain-water, sea-water, etc. 

There are three types of electron microscopes commonly used for microanalysis. These are the scanning electron microscope (SEM) with X-ray detectors, the electron probe microanalyser (EPMA), which is essentially a purpose built analytical microscope of the SEM type, and transmission microscopes (TEM and STEM) fitted with X-ray detectors. In a TEM, compositional information may also be obtained by... 

Figure 5.6 illustrates the arrangement of the components in a modern commercial microanalyser. 

Chouparova, E. Lanzirotti, A. Feng, H., et al., Characterization of Petroleum Deposits by Synchrotron Radiation-Based Microanalyses. Energy Fuels, 2004. 18 pp. 1199-1212. 

The partial oxygen pressure was checked with an OP-210/3 microanalyser [20] before and after the bubbling of oxygen through the electrolyte. The potential was measured against an Ag/AgCl reference electrode. 

Ospitali F., Rattazzi A., Colombini M.P., Andreotti A., di Leonardo G., XVI century wall paintings in the Messer Filippo cell of the tower of Spilamberto Microanalyses and monitor ing, Journal of Cultural Heritage, 2007, 8, 323 327. 

If the analyses are to be performed on board, the room in which the samples are prepared and analysed should, in fact, be built as a clean room. Many modern oceanographic vessels are constructed to accept modular laboratories, which can be removed between voyages. Clean room modules, complete with air conditioning and filtered air supply, have been built for several vessels. It is possible to perform accurate, precise microanalyses on board ship under less favourable conditions, but the analyst is really fighting the odds. 

In the case of the benzyloxytrityl-hydroxylamineresin 24b, the starting material is the Merrifield resin, chloromethylated polystyrene (1.7 mmol Cl x g 1) which is treated with 3 equiv. of 4-hydroxy-methyl benzoate in DMA with sodium methylate as base. The Beilstein test is used for monitoring and microanalyses showed the absence of chloride (Scheme 6). 

Lauchli A, Schwander H. X-ray microanalyser study on the location of minerals in native plant tissue sections. Experientia 1966 22 503-505. 

R. Castaing and G. J. Slodzian. Optique corpusculaire—premiers essais de microanalyse par emission ionique secondaire. J. Microscopie, 1(1962) 395-399. 

The copolymer compositions were studied by elemental microanalyses and H-NMR, revealing that the content of the copolymer units is in aU cases very similar to that of their corresponding feed. The PU(DiT-HDl) homopolymer exhibited a high crystallinity, but the introduction of the arabinitol-based diols led to a reduction in the crystallinity of the copolymers. In their TGA curves, the copolymers exhibited a mixed trend of the related homopolymers, and all of them were thermally stable, with degradation temperatures above 220°C. The degradation... 

Service central de Microanalyse du CNRS a Vernaison 69390 France. 

The spectral properties, microanalyses, and yields obtained for the various complexes are reported in Table I. 

To a solution of 16.3 g 2,5-dimethoxy-3,4-dimethylbenzaldehyde in 50 mL nitromethane there was added 3.0 g anhydrous ammonium acetate, and the mixture was heated on the steam bath overnight. There was then added an equal volume of MeOH, and with cooling there was obtained a fine crop of yellow crystals. These were removed by filtration, washed with MeOH, and air dried to provide 4.4 g of 2,5-dimethoxy-3,4-dimethy 1-6-nitrostyrene with a mp of 120-121 °C which was not improved by recrystallization from MeOH (50 mL/g). The mother liquors of the above filtration were diluted with H20 to the point of per-manent turbidity, then set aside in a cold box. There wasachunky, granular, tomato-red crystal deposited which weighed 2.5 g when dry. It had a mp of 118-119.5 °C, which was undepressed in mixed mp with the yellow sample. Both forms had identical NMR spectra (2.20, 2.25 CH, 3.72, 3.84 OCH, 6.80 ArH 7.76, 8.28 CH=CH, with 14 cycle splitting), infrared spectra, ultra violet spectra (max. 324 nm with shoulder at 366 nm in EtOH, two peaks at 309 and 355 nm in hexane), and microanalyses. Anal. (C HlsN04) C,H,N. 

Analytical Methods. Microanalyses (C,H,OCH3, C—CH3) were performed by Schwarzkopf Microanalytical Laboratory, Woodside, New York. 

Wollast, R., and Burny, F. Study of bone mineralization at the microscopic level using an electron probe microanalyser. Calc. Tiss. Res. 8, 73-82 (1971). 

Levy, R. Microanalyse Organique Elementaire. In Monographies de Chimie Organique. Paris Masson et Cie., 1961 Chim. Anal. (Paris) 46, 113 (1964). 

Petrographic data consist of light photomicrographs, electron micrographs, x-ray microanalyses, and observations on size and distribution of pyrite crystals. Light microscopy was carried out on all 57 sections, while electron microscopy and x-ray microanalysis were carried out on two sections, one from the Avery site (depth 210 cm) and one from the Barataria site (depth 106 cm). Micrographs and x-ray microanalysis of iron sulfides are shown in Figures 9 and 10, respectively. 

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